Speed-regulating apparatus



v. A. FYNN.

SPEED EEGULATING APPARATUS.

APPLICATION FILED MAY 27, 1918.

1,350,447, Pa entedAug. 24,1920.

mm 'ESS. IJV'VEJVTOR.

ATTORNEY.

UNITED. s'lja rss PATENT orrice;

vum'a m, or or. LOUIS, urseoom,.assronoa 'ro waozma anacrmc rac'rrmmo comm, 01" ST. LOUIS, mssoum, A coarona'rron or urssoom.

s'rnnn-nseuta'rme APPARATUS To all whom it may concern:

Be it known that I, VALilRE A. FYNN, a subject of the King of England, residing at the city of St. Louis, State of Missour United States of America,- have1nvented a certain new and useful Speed- Apparatus, of which the following issue a full, clear, and exact description as; will lating or adjusting the speed of prime movers, such as intern alcombustion engines.

In carrying out my invention, I make use of a dynamo electric machine, having two movable members, one or which is mechanically connected to the throttle, while the other is driven from the engine shaft, together with external means for producing a magnetization in one of the members, for instance in that member which is connected to the throttle, and means for closing the circuit of the other, for instance the engine driven member, so that an E. M. F. produced in the last mentioned member, owing to its rotation in the magnetization produced by the external source, may cause a large current to circulate in the engine driven member. Figure 1 illustrates one embodivment of my invention and Fig. 2 a modi fication.

The embodiment of the invention illustrated in Fig. 1 comprises a series generator with the armature 3, and the field winding 4. The armature mounted on the shaft 2- is driven by the prime mover. The adjustable resistance 5 is connected in arallel to the exciting winding 4. Include in the circuit of the series generator is an exciting coil 12, located on the movable field structure 7 normally held against the stop 8 by the spring 9 and connected to the engine throttle 20 at the point 11. The current through the coil 12 can be regulated by means of the adjustable resistance 6 connected in parallel therewith. The armature 16, which cooperates with the movable field structure7 is mounted on the shaft 10 and isdriven from the engine. This armature carries an ordinary ommuted winding, with which cooperate brushes held by supports 14, 15 which are insulatin 1y attached to the field structure 7. These hrushes are connected to regulating ture bru the coil 13 also located on the field structure 7 In Fig. 2, the armature 3 of the shunt wound generator is mounted on the shaft 2 and is driven by the. prime mover. The shunt wiggling 18 is connected to the armas es by way of the adjustable res1stance'19 and the external circuit of' this generator comprises the storage battery .17 connected in series with the exciting coils l3 and 12 located on the movable. field structure 7' An adjustable resistance 6 is connected in parallel to the two field coils 12 and 13. The movable field structure 7 is held against the stop 8 by the spring 9 Specification of Letters Patent; Patented Aug, 24, 1920" ap lication filed an 27, 1918. Serial in. 286,822.

and is connected to the throttle valve 20 the point 11. The armature 16 cooperates with the field structure 7 and is mounted on the shaft 10 driven from. the engine. This armature is provided with a commuted winding, with which cooperate brushes held in position by the supports 14 and 15 which are insulatingly carried by the field structure 7. These brushes are directly shortcircuited. A

In operating the arrangement shown in Fig. 1, the connection between the point 11 of the field structure 7 is so made that when 7 rests against. the stop 8, as shown, the

throttle is wide open. Assuming the engine to be running at full had, thus necessitating a wide open throttle, the adjustments at the resistances 5 and 6 are so made that the current produced." by, the generator 3 just sufiicient to cause such a current to flow in the armature 16 and in the field winding 13 that the torque exerted by the counterclockwise revolving armature on the field structure 7 balances the'efiortof the spring 9 without, however, causing the structure 7 to leave the stop 8. Should the load now be reduced, then the engine speed will immediately increase, with the result'that the magnetization produced by the coil 12 and -the speed of the armature 16 will increase.

Both of these reasons will increase the torque A exerte'd on the field structure 7, which will move away from the stop 8 and reduce the throttle opehing, thus reducing the speed of the engine. v r

Instead of connecting the brushes cooperating with the armature 16 to an exciting coil located on the cooperating field structure, these brushes can be short circuited as shown in Fig. 2 and both excit-.

in coilsQlQ and 13 can be placed in cirnecessary to locate the brushes so asto place the current aris ofthe armature at right angles to the magnetization produced by the field structure 7. These brushes may be so placed as to cause part of the armature ampere turns to help or oppose the magneti- I 'aation' reduced from the field structure. to Nor is it necessary tosupport the brushes 1' ;t'rom the field structure 7.. j lit the. angular 1' movement ct said structure is not exces- I siyiehthen the brushes can be held stationaryt connections are so made that the E. M. F.

. generated by the opposes, the QM. ofthe stora e battery .1? atm near-thespeed at Which't e engine to is to run he? soon as the engine speed increases, the generator? sends a rapidly increasing charging current into the. battery 17 this current produces a. magnetization :in the field structure 7, which immediately as causes a very large-current to be generated.

i in the armature 16 .whichcurrent is still further increased because of the increasein the speed of the armature, 16. The result is that a powerful torque is at onceexerted on so the field structure? and in the direction in which the armature 1e revolves. In this case, as in the previous one the throttle is normally held open and the torque ot the field structure '3' is utilized to reduce the as speed proportional to that of the device to be regulated and the other member being connected to the speed controlling means,

and means independent of the dynamo electric machine for varying the excitation to of said dynamo electric machine in response to variations in speed of the device to'be regulated e operation or th s arrangement shown. as; "rnllig. 2' is quite similar, except that the diznamo 3, 18 equals and the intone? .2. ln t ea re ulatin a aratusthe cult withthe'series generator 3, d. It is not Y g pp combinationwitli a device to be regulated, of speed contro'llmg means therefor, a dy namo electric machine having both members movable, one member being driven at a speed proportionalto that of the device tow I be regulated and the other member-being" connected tel-the speed controlling m nna generator driven by the device to-beregu- 1 med rrr y s ex itin ourrentftothe dynamo electric machin 3. ln speed regulating {apparatus the combination with a device-to be regulated, of speed controlling means therefor, a dyname electric machine having bothmembers movable, one member being I drivenat' a speed proportional to that of the device tobe regulated and the other member beingnected to the speed controlling means, means for short circuiting one mom or of said dynamo electric machine', and means for separatelp encitin the other member.=

a. n spee prime movers, the combination rvvith speed controlling means thereion; oil a dynamo electric machine having both members movable, one member being driven at a speed proportional to that of he prime mover and the other. member beingconnectedto the speed controlling means, means for short circultln one member of said dynamo elec-' tric rec ine, a enerator driven by the prime mover, an a storage battery, lsaid generator and battery being connected in opposition and in series circuit with the other member of the dynamo el machine.

5. ln speed regulating ap combination with a device to e regu ated,

regulating apparatus teraratue the of speed controlling means therefor, a dy-' name electric machine for operating the speed controlling means, external means tor varying the excitationyof said dynamo electric machine in response to variations in engine speed, and means for varying the armature ampere turns of the dynamo electric machine in response to variations in excitation'and variations in'engine speed. In .testimony- 'vvhereofil have hereunto set my hand and afinedmy seala veneer-arm. ta 

